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VW Jetta TDI

3744 messages,  Last post on Dec 06, 2009 at 6:58 AM

You are in the Volkswagen Jetta Forum. Your Hosts are pat & karens

What is this discussion about? Volkswagen Jetta, Biodiesel, Diesel, Sedan


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#3495 of 3744
Re: How to prepare a car to sit for months this winter? [bpeebles] by Mr_Shiftright HOST
Oct 18, 2009 (11:25 am)
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Replying to: bpeebles (Oct 18, 2009 11:04 am)

I agree...just add some fuel conditioner, install a battery-maintainer, and forget about the car after that until you return.
#3496 of 3744
Re: How to prepare a car to sit for months this winter? [bpeebles] by jogousa
Oct 18, 2009 (12:15 pm)
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Replying to: bpeebles (Oct 18, 2009 11:04 am)

Well, does this apply to diesel exhaust as well? I am not so sure as I don't see any condensation from the exhaust when I start my Tdi as oppose to starting a gasoline car and the condensation resulting from gas exhaust going through a catalytic converter. Anybody out there who had an issue with corrosion of their diesel exhaust pipes?
In the aviation application (R-22 helicopter, for example) that is exactly what is recommended when the ship is not being used in winter. Start and run it once per week for a few minutes.
#3497 of 3744
Re: How to prepare a car to sit for months this winter? [jogousa] by british_rover
Oct 18, 2009 (12:50 pm)
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Replying to: jogousa (Oct 18, 2009 12:15 pm)

A turbine engine is very different from a regular reciprocating internal combustion engine assuming a R-22 uses a jet turbine motor.
 
A diesel engine is going to act the same way as far as condensation building up in the crank case.
#3498 of 3744
Re: How to prepare a car to sit for months this winter? [british_rover] by Mr_Shiftright HOST
Oct 18, 2009 (2:14 pm)
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Replying to: british_rover (Oct 18, 2009 12:50 pm)

I'd also worry about fuel dilution if you start up an engine and run it briefly and repeatedly. Not quite sure how fuel dilution relates to various diesel injection systems vis a vis gas engines but I would think any cold start fuel/air mixture would be rich.
#3499 of 3744
Re: How to prepare a car to sit for months this winter? [british_rover] by jogousa
Oct 18, 2009 (4:26 pm)
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Replying to: british_rover (Oct 18, 2009 12:50 pm)

Well, that makes sense - did not think about the condensation up in the crank case although I have read somewhere that some people spray inside the crank case with some special mixture just for this purpose to avoid the possible rust build up.
Good advice though...never had that problem and in my opinion it's always better to drive it at least once a week for a while if there is someone to do it. Main issue would be a battery drain because many newer cars have all kinds of things (e.g. alarm ) running and possibly draining the battery when the car is just parked and not used.
 
By the way, R-22 doesn't have a turbine motor (none of the Robinsons do) it just a plain 6 cylinder aviation engine.
#3500 of 3744
Condensation from what?? [jogousa] by bpeebles
Oct 20, 2009 (5:14 pm)
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Replying to: jogousa (Oct 18, 2009 12:15 pm)

You said ==> "condensation resulting from gas exhaust going through a catalytic converter"
 
I cannot let such innaccuraces go by.... the H2O (water droplets) seen from exhaust is mostly a by-product of combustion. A cold catalytic converter cannot perform its job so it does not come into play until engine is fully warmed up. At that point... all H2O is in the form of steam.
 
Reminder: Combustion is the combining of anything with Oxygen... (in this case Hydrogen) resulting in H2O.
 
When your engine combustion-chamber runs too hot... even the Nitrogen in air combusts with the Oxygen... this is called NOx (nitrates of oxygen). The reason engines have a EGR (Exhaust Gas Recirculation) system is specifically to reduce NOx
 
Even a simple CANDLE produces H2O... just hold a butterknife over the flame for a few seconds and you will see H2O condensation on it.
 
A catalytic converter is mainly intended for Oxidation of carbon monoxide to carbon dioxide. (2CO + O2 → 2CO2) also Oxidation of unburnt hydrocarbons to carbon dioxide and water (CxH2x+2 + 2xO2 → xCO2 + 2xH2O)
 
Besides... the VW TDI has a catalyst in the exhaust just like a gasser engine.... so your assertion is incorrect from the get-go 8-)
#3501 of 3744
Re: Condensation from what?? [bpeebles] by Mr_Shiftright HOST
Oct 21, 2009 (8:16 am)
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Replying to: bpeebles (Oct 20, 2009 5:14 pm)

So how much H20 do you get from one gallon of gasoline?
#3502 of 3744
Re: Condensation from what?? [Mr_Shiftright] by moparbad
Oct 21, 2009 (3:13 pm)
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Replying to: Mr_Shiftright (Oct 21, 2009 8:16 am)

5 milliliters less than one gallon water from combustion of one gallon gasoline.
#3503 of 3744
Re: How to prepare a car to sit for months this winter? [Mr_Shiftright] by shrifty
Oct 21, 2009 (5:27 pm)
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Replying to: Mr_Shiftright (Oct 18, 2009 2:14 pm)

Thanks again to all with their valuable input! At the moment, I'm not sure if I will have someone that is able to run the car during the winter or not, but at least now I have a much better idea of what needs to be done.
#3504 of 3744
Re: How to prepare a car to sit for months this winter? [shrifty] by Mr_Shiftright HOST
Oct 22, 2009 (9:10 am)
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Replying to: shrifty (Oct 21, 2009 5:27 pm)

Well let's say if you do or you don't, no big deal either way.

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